HURRY PLEASE HELP I REALLY NEED THE ANSWERS Briefly describe the three layers of the mantle. Include
temperatures.
•Lithosphere:
•Asthenosphere:
•Mesosphere:

lithosphere

Explanation:

is up of brittle crust and the top part of upper mantel and also the coolest and most rigid part of the earth

Lithosphere:

The lithosphere is the rigid outermost layer of the earth known as the mantle and the crust. And it is defined by its rigid mechanical properties.

Asthenosphere:

This layer is highly viscous and is very mechanically weak and is located below the Lithosphere it is also known as the ductile region of the upper mantle.

Mesosphere:

The mesosphere is the third layer of the atmosphere, directly above the stratosphere and directly below the thermosphere. In the mesosphere, temperature decreases as altitude increases.

i'm thinking (a) to keep sand in place; ////////////

explanation: a sand fence or sandbreak, like a snow fence, is used to force windblown, drifting sand to accumulate in a desired place. sand fences are employed to control erosion, sand dune stabilization, keep sand off roadways, and to recruit new material in desert areas.

if the type of the food available changes, then the frequency of beak types will change, because birds with beaks more suited to the available food will be more successful over time.